California has passed a new rule regulating replacement car tires, mandating that they meet higher efficiency standards. The regulation aims to reduce fuel consumption and emissions by ensuring tires sold as replacements perform similarly to original equipment.

Environmentalists praised the move, arguing it will cut greenhouse gas output and save drivers money at the pump over time. They view the rule as a practical step toward meeting the state's ambitious climate goals.

However, tire manufacturers warned that the change could hurt American companies and lead to higher prices for consumers. Industry groups say compliance costs will be passed on, potentially making tires less affordable, especially for low-income drivers.

The rule, set to take effect in coming years, reflects California's broader push to regulate vehicle components for environmental benefit. Stakeholders on both sides are gearing up for potential legal challenges or federal preemption debates.